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108 MW Natural Gas standby in Santa Cruz, AZ — Tucson Electric Power Company
108 MW
Nameplate Capacity
4
Generators
units
Natural Gas Fired Combustion Turbine
Technology
1989
Operating Since
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | UNS Electric, Inc | UNS Electric | — |
| Owner(s) | UNS Electric, Inc | Fortis | — |
| Status | Standby | — | — |
The Valencia power plant is a 108 MW natural gas-fired facility located in Santa Cruz County, Arizona. It began operating in 1989 and consists of four natural gas-fired combustion turbine generators. The plant is owned by Fortis, a Canadian company, and operated by UNS Electric, Inc., a subsidiary of Fortis. Valencia operates within the Tucson Electric Power Company balancing authority and the Western Electricity Coordinating Council (WECC) NERC region.
In the latest year of reported generation, Valencia produced 4,779 MWh of electricity, achieving a capacity factor of 0.5%. According to available data, the plant ranks 25th out of 26 power plants in Arizona and 917th out of 945 plants nationally. Financial data indicates an installed cost of $285.45 per kW, based on FERC filings.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
382 MWh
Latest Month
4.8K MWh
Annual Generation
0.5%
Capacity Factor
CO₂ Intensity
1711 lb/MWh
Low-utilization plant — per-MWh rate is dominated by startup/standby emissions; not directly comparable to baseload averages.
NOx
5 lb/MWh
SO₂
Gas turbine · UNS Electric, Inc. · Data from 2015–2024
$346/kW
Installed Cost
$24/kW
Annual CapEx
$217.5/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
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ask pi about ValenciaTucson Electric Power Company (TEPC)
Grid Voltage
138.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
0.047 lb/MWh
CH₄
0.036 lb/MWh
N₂O
0.004 lb/MWh
Capacity Factor
0.6%
Annual Net Gen
6 GWh
CO₂eq
1713 lb/MWh
Subregion
WECC Southwest